Using these definitions that include the entirety of the process, no energy is clean energy except for Sunlight + 6CO2 + 6H2O -> C6H1206 +6O2. Even solar power

Using these definitions that include the entirety of the process, no energy is clean energy except for Sunlight + 6CO2 + 6H2O -> C6H1206 +6O2. Even solar power will have something "dirty" along the chain somewhere. The closest we can get is to "offset" the dirtiness.